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==== Power plant connection ====

The power plants can be connected to the grid in two ways:
 
|< 700px >|
^  serial with grid power sensor  |^  parallel with grid power sensor  |
|  {{ :hiq_energy:hems:hardware:connected_power_plant_in.png?direct400 |}}  ||  {{ :hiq_energy:hems:hardware:connected_power_plant_ex.png?direct400 |}} |

When configuring the power plant, select
   ***in**: serial (**in**ternal) with grid power sensor
   ***ex**: parallel (**ex**ternal) with grid power sensor
The power plants are configured as internal by default.

==== PV inverter ====

Obtaining relevant data from photovoltaic is possible by two ways:\\
1. adding power-sensor to measure produced electricity by PV (no connection to interver) - on how to add power sensor please see [[en:robotina_charger:commissioning:power_sensor|Power Sensor]]\\
2. connecting PV inverter by Modbus TCP to EVSE (only for SolarEdge inverters)

=== EVSE and PV inverter connection ===

|< 700px >|
|  {{ :hiq_energy:robotina_charger:rc_pv_inverter_connection_router.png?direct&800|}}  |

To add inverter on HEMS configurator:
  *   on settings page inside source table, select SolarEdge inverter. Please see [[en:robotina_charger:software#settings|]]
  *   on io mux page set IP address for inverter. Please see [[en:robotina_charger:software#io_mux|]] 

To setup Modbus TCP on Inverter using SetApp:
  *   Select Site Communication menu 
     * RS485-1 -> Protocol -> SunSpec (Non-SE Logger)
     * RS485-1 -> Device ID, and enter the number 1
     * Modbus TCP and set to Enable
     * set TCP port to 502

**Note**:\\ The TCP server idle time is 2 minutes. In order to leave the connection open, the request should be made within 2 minutes.\\ It is important to follow rules above, firstly to set HEMS configurator following Inverter setup.